English verb conjugation
COULD PLOP

Regular verb: plop - plopped - plopped

Affirmation

Simple form	V-ing form
I could plop you could plop he could plop we could plop you could plop they could plop	I could be plopping you could be plopping he could be plopping we could be plopping you could be plopping they could be plopping
Perfect	V-ing perfect
I could have plopped you could have plopped he could have plopped we could have plopped you could have plopped they could have plopped	I could have been plopping you could have been plopping he could have been plopping we could have been plopping you could have been plopping they could have been plopping

Negation

Simple form	V-ing form
I couldn't plop you couldn't plop he couldn't plop we couldn't plop you couldn't plop they couldn't plop	I couldn't be plopping you couldn't be plopping he couldn't be plopping we couldn't be plopping you couldn't be plopping they couldn't be plopping
Perfect	V-ing perfect
I couldn't have plopped you couldn't have plopped he couldn't have plopped we couldn't have plopped you couldn't have plopped they couldn't have plopped	I couldn't have been plopping you couldn't have been plopping he couldn't have been plopping we couldn't have been plopping you couldn't have been plopping they couldn't have been plopping

Interrogative form

Simple form	V-ing form
could I plop? could you plop? could he plop? could we plop? could you plop? could they plop?	could I be plopping? could you be plopping? could he be plopping? could we be plopping? could you be plopping? could they be plopping?
Perfect	V-ing perfect
could I have plopped? could you have plopped? could he have plopped? could we have plopped? could you have plopped? could they have plopped?	could I have been plopping? could you have been plopping? could he have been plopping? could we have been plopping? could you have been plopping? could they have been plopping?

Interro-negative form

Simple form	V-ing form
couldn't I plop? couldn't you plop? couldn't he plop? couldn't we plop? couldn't you plop? couldn't they plop?	couldn't I be plopping? couldn't you be plopping? couldn't he be plopping? couldn't we be plopping? couldn't you be plopping? couldn't they be plopping?
Perfect	V-ing perfect
couldn't I have plopped? couldn't you have plopped? couldn't he have plopped? couldn't we have plopped? couldn't you have plopped? couldn't they have plopped?	couldn't I have been plopping? couldn't you have been plopping? couldn't he have been plopping? couldn't we have been plopping? couldn't you have been plopping? couldn't they have been plopping?